Solution of problem N3807 probability theory total prob

Solution of problem N3807 probability theory total prob

3807. Parts from three machines arrived at the assembly shop of the plant. The 1st machine gives 3% of marriage, the 2nd - 1%, the 3rd - 2%. Determine the probability of getting a defective part to the assembly if 500 parts from the 1st machine gun, 200 from the 2nd and 300 from the 3rd machine arrived at the workshop.

Additional information:

Detailed solution. Decorated in Microsoft Word 2003 (Quest decided to use the formula editor)